Combination pump



Jan. 25, 1949. W. L. KNOTT 2,460,179

COMBINATION PUMI? Filed June 21, 1945 IN V EN TOR.

WALTER LKNoTT. BY

Quay. (aw S Patented Jan. 25, 1949 wow 2,460,179 coivrBmA'rIoN PUMPave-nee Knott, Los se ue oam, "assignor to Les'trBfiCl'ark, Hiiuston,-'1ex.

s ucauonrune'zl, 1945, SerialNo. 600,750

2 Clainis. l

"The inventionrelates to a combinationlpump of the type used inproducing liquidirom wells.

There are generally'two types of pu p 'in'pumping wells, the typeincluding working barrel and a plunger for reciprocating therein, andthe type generally known by the trade as a fluid packed pump whereconcentric sleeves slide one within the other to provide a seal.

Each of these-pumps have their peculiar adu vantages and disadvantagesdue to leakage, wear,

andthe effect of foreign-matter upon the parts.

The present invention, however, contemplates a combination of theplungerand-the working barrel type or" pump with the concentric sleevetype of pump to produce a construction which apprcpriates the betterfeatures of each. I I

It is one of the objects of the invention "to provide a combinationfluid pack and'plunger pump wherein the upper portion of the pump issealed with a reciprocating sleeve construction and the lower portion ofthe pump constitutes a plunger working against iron surfaces so as toobtain a maximum sealing and wearing effect.

Another object of the invention is to provide a concentric sleeve typeof pump wherein the sleeve is elongated to provide a plunger to operatein a working barrel.

Another object of the invention is to provide a deep well pump with anoperating plunger whose upper end is sealed with a concentric sleeve.

Other and further objects of the invention will be readily apparent whenthe following description is considered in connection with theaccompanying drawing, wherein- Fig. l is a vertical sectional view ofthe pump installed and in operating position in the well.

Fig. is a side elevation of the Well equipped with the pumpconstruction.

In Fig. 2 the well bore 3 has been drilled and equipped with a casing 4having the usual casing head 5 thereon. A. string of tubing 5 has beenrun into the well and is connected to the perforated strainer or screenI so that the liquid from the producing formation 7' may enter thetubing.

The tubing 6 is seen enlarged in Fig. l and is made up of the sectionssuch. as 5, S, and i9 connected together with the couplings i The pumpconstruction is shown as having been incorporated in the section B andis made up oi a lower bushing I5 having a tapered seat IE thereso as toreceive the standing valve 57. The standing valve carries the valvemember l8 confined by a cage i9 so that when there is a suction abovethe valve, a flow of liquid from below the standing valv will "movetherethrough as in'jdy cated'byth'e arrow 2fl. This standing valve mayhave the threaded pin 2| thereon by which --i t may be removed orinserted,

'It is a 'well recognized fact that steel working against "anironsurface provides a combination which will form a seal and will result inlong continued service. -fIhe iron surfaceis provided hereln'asb'einginadeup'of 'a' plurality of 'members 25 di'spo'sedwithinthe'tubing'section'8. Any desired number of these members maybe applied end toendrelative to each other, eachmem ber preferably having a 'recess'ed areaj 2 6 "to receive the extension Z'lof the next memberzt there'- above.Eachof these members has an opening tli'erethrough so as to provide'a1working surface "which is "equivalent to the usual working bar"- relin a plunger type of 'pump.

The plunger in this invention is in t e term of enumerated pipe "orsleeve 32 preferably made of steel whose outer surface 3| is arranged forrecip-rocating movement upon the inner surfaces 30 of the bushings suchas 25 and 28. A number of these members may be placed end to end so asto provide a suitable'length which may be up to 15 feet or 20 feet.

All of these members such as 25 and 28 are fitted within the tubingsection 8 and then confined by the collar 33 so that they are firmlyarranged in position. A retainer pipe 34 is threaded at 35 into thecollar 33 so as to form a compact assembly. The coupling 36 connects thecollar 33 to the tubing section 8.

The lower end of the working sleeve or tubing 32 preferably has arounded lower end to guide the sleeve into position and carries atraveling check valve 38 which in operation will open as the plungermoves down but will close on the upward movement so as to create asuction in the chamber 39 above the standing valve 18 in order to drawin a new charge of liquid from the well on the up stroke. 011 the downstroke the standing valve 18 will close and the liquid which is thustrapped in the chamber 33 will be forced to pass. upwardly through thetraveling valve and into the hollow interior 40 of the sleeve 32.

The sleeve 32 is of a substantial length and projects above the collar33 into the tubing section 9 and has the head 4| substantially held at4'2 thereon.

This head 41 carries a cage 13 and the upper traveling valve 44 whichtends to close the passage 40 on the up stroke and allows the flow ofliquid through the plunger into the tubing area 45 on the down stroke. Astring of sucker rods 45 is connected to this head to cause thereciprocation and pumping action of the sleeve 32.

Great difliculty is encountered in the usual type of plunger pump due tothe fact that sand and other matter being pumped along with the oiltends to'isettle in the tubing when it is pumped into thee'nlarged area45 of the tubing. One of the advantages of a concentric sleeve type ofpump is that sanding up of the working barrel is avoided due to theconcentric sleeve arrangement. The present invention thereforecontemplates a construction to accomplish this advantage and an outersleeve 50 is therefore substantially held in place at on the outerperiphery of the head 4| and is] concentrically arranged relative to theworking sleeve 32. This sleeve 50, however, is considerab y shorter thanthe working sleeve 32 and in the lowermost position of the plunger, thelower end 52 of this sealing sleeve 50 will closely approach the collar33 as best seen in Fig. 1. The sleeves 32 and 50 will be spaced apart toprovide an annulus 54 therebetween. This annulus will be filled by thestanding sleeve or tubing 55 threaded at 56 into the upper end of thecollar 33. This provides an elongated sealing surface between the outerperiphery of the upper end or" the working sleeve 32 and the innerperiphery of the sealing sleeve 50. If desired, vents or breatheropenings 58 may be provided in the inner workin sleeve so as toaccommodate the expansion andcontraction of the annulus 54 during thereciprocating movements.

In actual operation the advantages of a plunger and working barrel typeof pump are obtained due to the lower construction of the sleeve 32while the efficiency and long service of a concentric sleeve type ofpump are obtained from the combination of the sleeves 5D and 32.

What is claimed is:

1. Atpump for wells including a tubing in the well, a standing valve inthe tubing, a plurality of iron bushings disposed in said tubing abovesaid valve, said bushings being hollow to provide a working barrel, acollar in said tubing to anchor said bushings, a standing tube extendingupwardly from said collar, a plunger including a head and a pair ofconcentric spaced tubes depending therefrom to seal on the inside andoutside of said standing tube, the inner of said tubes being of a lengthto extend into said bushings to work therein whereby a combinationsleeve packed and working barrel seal pump is provided.

2. A pump for wells including a tubing in the well, a standing valve inthe tubing, a plurality of iron bushings disposed in said tubing abovesaid valve, said bushings being hollow to provide a working barrel, acollar in said tubing to anchor said bushings, a standing tube extendingupwardly from'said collar, a plunger including a head and a pair ofconcentric spaced tubes depending therefrom to seal on the inside andoutside of said standing tube, the inner of said tubes being of a lengthto extend into said bushings to Work therein whereby a combinationsleeve packed and working barrel seal pump is provided, said plungerhaving a pair of spaced traveling valves therein.

WALTER L. KNOTT.

REFERENCES CITED The following references are of record in the his ofthis patent:

UNITED STATES PATENTS Number Name Date 1,545,475 Adams July 14, 19251,801,304 Carson Apr. 21, 1931 2,067,774 Matthews et a1 Jan. 1937

